1

Place chopped chillies, garlic, oregano, chilli powder and vinegar in a food processor. Process until almost smooth. Pour into a large, ceramic dish.

2

Add pork. Turn to coat. Cover and refrigerate, turning occasionally, for 4 hours or overnight.

3

Preheat oven to 200°C. Heat oil in a frying pan over high heat. Add pork. Cook, turning, for 5 minutes or until browned. Place pork on a greased baking tray. Bake for 12 to 15 minutes or until just cooked through. Stand for 10 minutes. Thinly slice.

4

Meanwhile, wrap tortillas in foil. Place on a baking tray. Bake for 10 minutes or until heated through.

5

Place tortillas on a plate. Cover with foil to keep warm. Serve tortillas with lettuce, tomatoes, avocado, pork and toppings.